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Definitions

unquestionable

[uhn-kwes-chuh-nuh-buhl] / ʌnˈkwɛs tʃə nə bəl /
ADJECTIVE
definite; beyond doubt
Synonyms
STRONGEST
absolute indisputable self-evident undeniable unequivocal unmistakable
WEAK
accurate authentic bona fide certain clear cold conclusive dependable down pat downright established faultless flat flawless for certain genuine incontestable incontrovertible indubitable irrefutable manifest no ifs ands or buts obvious pat patent perfect positive real reliable superior sure sure-enough true undisputable undoubted unimpeachable veritable well-founded well-grounded
Antonyms
STRONGEST
disputable indefinite uncertain unsure vague
WEAK
doubtful questionable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Foreign minister Anand has called Arctic defence "an unquestionable national security priority of this government".

From BBC • Feb. 6, 2026

No matter where people stand on Schulz’s point of view on comedy, his mark on pop culture with his punchlines has become unquestionable.

From Los Angeles Times • Mar. 4, 2025

The precision of the drops is astonishing, the impact heart-lifting, their moments of victory obvious and unquestionable.

From Los Angeles Times • Jan. 11, 2025

The first couple of days of the Kamala Harris–Tim Walz rollout were an unquestionable success.

From Slate • Aug. 10, 2024

Even so, it is unquestionable that Fanny’s life and then her death affected Emma profoundly.

From "Charles and Emma: The Darwins' Leap of Faith" by Deborah Heiligman